30243642 has 64 divisors (see below), whose sum is σ = 71971200. Its totient is φ = 8352000.

The previous prime is 30243641. The next prime is 30243671. The reversal of 30243642 is 24634203.

It is a happy number.

It is a super-3 number, since 3×30243642³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30243641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86484 + ... + 86832.

It is an arithmetic number, because the mean of its divisors is an integer number (1124550).

Almost surely, 2^30243642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30243642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35985600).

30243642 is an abundant number, since it is smaller than the sum of its proper divisors (41727558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30243642 is a wasteful number, since it uses less digits than its factorization.

30243642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 30243642 is about 5499.4219696255. The cubic root of 30243642 is about 311.5621529261.

Adding to 30243642 its reverse (24634203), we get a palindrome (54877845).

It can be divided in two parts, 3024 and 3642, that added together give a palindrome (6666).

The spelling of 30243642 in words is "thirty million, two hundred forty-three thousand, six hundred forty-two".